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Diffusion of Slow Electrons in Gases

Description: The properties of electrons in a gas and an external electric field, e.g., agitation velocity, free path, energy lost per collision, and collision cross sections, were determined for electrons of energy less than 2 ev in a large number of gases. The computations were made from previously measured values for Townsend's energy factor or the ratio of electron agitation energy to molecule thermal energy. Results are presented for hydrogen, nitrogen, carbon dioxide, methane, ethylene, cyclopropane, and argon. (D.L.C.)
Date: October 24, 1961
Creator: Forester, D. W. & Cochran, L. W.
Partner: UNT Libraries Government Documents Department
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Waste Treatment and Disposal Progress Report for June and July 1961

Description: 7 7 6 4 : 9 8 9 6 5 : 9 aluminum nitrate waste was calcined in the close-coupled continuous evaporator-pot calciner unit. Waste oxides from TBP-25 waste were incorporated into glassy materials after the addition of phosphate and borate fluxing agents. Melts formed at 850 to 950 deg C were glassy solids when cooled and had densities from 2.41 to 2.47 g/ml. Waste volurne reduction factors were from 7.6 to 9.3. Low-Level Waste Treatment. A demonstration run was completed in the 60 liters/hr scavenging-ion exchange pilot plant on ORNL low-activity waste. Decontamination factors were satisfactory after 1500 resin bed voluumes of waste had been treated, i. e, Sr> 1000, TRE 100, Cs> 100, and sufficiently high for other activities that the waste activity was reduced to <10% of MPC. The physical properties of vermiculite, clinoptilolite, and rock phosphate were found to be suitable for second-stage treatment of process waste. Engineering, Econommc, and Hazards Evaluation. A cost study of the conversion of high-level solutions to solids by pot calcimation was completed. Aging had a negligible effect on costs for processing in a given vessel size. The lowest cost was 0.87 x 10/sup-2/ mill/kwh/sub 3/ for processing acidic Purex and Thorex wastes in 24-in.-dia. vessels, and the highest was 5.0 x 10/sup -2/ mill/kwh/sub e/ for processing reacidifled Purex and Thorex wastes im 6-in.-dia. vessels. Disposal ion Deep Wells. Test drilling at the site of the second fracturing experiment is nearly completed. The upper grout sheet extends out from the injection well some 500 ft to the east and northeast, but only- short distances out in other directions. The lower grout sheet extends largely to the north and northwest, but its outer limits are still undefimed. Disposal in Natural Salt Formations. Stress measurements in the pillars of the Hutchimson mine …
Date: October 24, 1961
Creator: Blanco, R. E. & Struxness, E. G.
Partner: UNT Libraries Government Documents Department
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Recent US target-physics-related research in heavy-ion inertial fusion: simulations for tamped targets and for disk experiments in accelerator test facilities

Description: Within the last few years, there have also appeared in the Heavy-Ion Fusion literature several studies of targets which have outer tampers. One-dimensional simulations indicate higher target gains with a judicious amount of tamping. But for these targets, a full investigation has not been carried through in regards to conservative criteria for fluid instabilities as well as reasonable imperfections in target fabrication and illumination symmetry which all affect target ignition and burn. Comparisons of these results with the gain survey of Part I would have to be performed with care. These calculations suggest that experiments relating to high temperature disk heating, as well as beam deposition, focusing and transport can be performed within the context of current design proposals for accelerator test-facilities. Since the test-facilities have lower ion kinetic energy and beam pulse power as compared to reactor drivers, we achieve high-beam intensities at the focal spot by using short focal distance and properly designed beam optics.
Date: June 24, 1982
Creator: Mark, J.W.K.
Partner: UNT Libraries Government Documents Department
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Control of pyrite surface chemistry in physical coal cleaning

Description: The successful separation of pyrite from coal by flotation is dependent to a large extent upon the selectivity of the process, and the use of a pyrite depressant is one of the most important and cost-effective techniques for achieving this. This report evaluates the effects of three factors on the floatability of pyrite. These are (1) the superficial oxidation of pyrite, (2) the contamination of pyrite surfaces by carbonaceous matter, and (3) pulp redox potentials. XPS (x-ray photoelectron spectroscopy) and IR spectrometry have been used to identify surface reaction products. Microflotation, laboratory-scale conventional flotation and microbubble column flotation were used to quantify the effects of these factors. It was found that low (reducing) pulp potentials are effective depressants of pyrite (more so for fresh, unoxidized samples than for oxidized samples), whilst at the same time do not materially affect coal flotation.
Date: June 24, 1992
Creator: Luttrell, G. H.; Yoon, R. H. & Ou, Z. S.
Partner: UNT Libraries Government Documents Department
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Method for fabricating a seal between a ceramic and a metal alloy

Description: A method of fabricating a seal between a ceramic and an alloy comprising the steps of prefiring the alloy in an atmosphere with a very low partial pressure of oxygen, firing the assembled alloy and ceramic in air, and gradually cooling the fired assembly to avoid the formation of thermal stress in the ceramic. The method forms a bond between the alloy and the ceramic capable of withstanding the environment of a pressurized water reactor and suitable for use in an electrical conductivity sensitive liquid level transducer.
Date: July 24, 1981
Creator: Kelsey, P.V. Jr. & Siegel, W.T.
Partner: UNT Libraries Government Documents Department
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Development of ultrafiltration and inorganic adsorbents for reducing volumes of low-level and intermediate-level liquid waste: October--December 1977

Description: The exposures of noncellulosic ultrafiltration membranes to a radioactive environment simulating up to 24 months of exposure to a ..beta.. dose of 10 ..mu..Ci/cm/sup 3/, a ..gamma.. dose of 10/sup -5/ ..mu..Ci/cm/sup 3/, and an ..cap alpha.. dose of 4.9 x 10/sup -3/ ..mu..Ci/cm/sup 3/ were completed. Exposure to ..beta.. and ..gamma.. radiation did not affect membrane performance. After a simulated six months of exposure to ..cap alpha.. radiation some degradation of membrane performance occurred. Several experiments were made on a laboratory-scale reverse-osmosis unit using the product from ultrafiltration as feed. Rejection of activity ranged from 88 to 99 percent. The ''continuous'' ultrafiltration pilot run was completed. Approximately 40,000 gal were processed in over 70 hr of operating time without shutdown for cleaning. Flux and rejection were maintained relatively steady over this period. Rejection of gross alpha ranged from 80 to 99.5 percent depending on the ionic content of the waste stream. Flux rates ranged from 5 to 8 liters/min over this period. The engineering column tests were continued using uranium-233 with product from the ultrafiltration pilot plant. Flow rates and pH were varied in order to determine optimum operating conditions.
Date: February 24, 1978
Creator: Koenst, J. W.; Herald, W. R. & Roberts, R. C.
Partner: UNT Libraries Government Documents Department
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Mathematical models and illustrative results for the RINGBEARER II monopole/dipole beam-propagation code

Description: RINGBEARER II is a linearized monopole/dipole particle simulation code for studying intense relativistic electron beam propagation in gas. In this report the mathematical models utilized for beam particle dynamics and pinch field computation are delineated. Difficulties encountered in code operations and some remedies are discussed. Sample output is presented detailing the diagnostics and the methods of display and analysis utilized.
Date: May 24, 1982
Creator: Chambers, F.W.; Masamitsu, J.A. & Lee, E.P.
Partner: UNT Libraries Government Documents Department

[Students at Ralph Strangis guest lecture]

Description: Photograph of a group of students at a guest lecture featuring Ralph Strangis. They are all gathered around a central conference table, some are sitting while others stand. Strangis is standing at the head of the table and is holding a backpack.
Date: March 24, 2015
Creator: Clark, Junebug
Partner: UNT Libraries Special Collections
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[News Script: School]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: September 24, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
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[News Script: Fair]

Description: Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: October 24, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
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[Letter from Bill McCarter to Jan Schronk, August 24, 1990]

Description: Photocopy of a letter from Bill McCarter, co-director of North Texas Institute for Educators on the Visual Arts, to Jan Schronk, Art Supervisor of Hurst-Euless-Bedford ISD. Hoping the presentation that Schronk attended, fulfilled basic expectations she had in terms of understanding DBAE better, and that the art specialists who participated in the workshop have a better understanding of NTIEVA's goals for the HEB district.
Date: August 24, 1990
Creator: McCarter, William
Partner: UNT Libraries Special Collections
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[Letter from Rick Stewart to Colleagues, August 24, 1995]

Description: Photocopy of a letter from Rick Stewart, Acting Director and Chief Curator of the Amon Carter Museum, to his colleagues. In regards to the send-off party for Allison Perkins, Education Director of the Amon Carter. The event is to be held, September 11, 1995 at the Amon Carter Museum Library from 3:30 pm to 5:00 pm.
Date: August 24, 1995
Creator: Stewart, Rick
Partner: UNT Libraries Special Collections
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[Letter from Bill McCarter to Nicole Murphy Holland, August 24, 1990]

Description: Photocopy of a letter from Bill McCarter, co-director of North Texas Institute for Educators on the Visual Arts, to Nicole Murphy Holland, Vice President for Exhibitions InterCultura. In regards of McCarter's enthusiasm for the presentation regarding "The Wanderers," and mentions David Coffey doing a superb job amplifying the content written by Andrew Harris. McCarter says that it is imperative that art teachers at both an elementary and secondary level be exposed to excellent presentations and that Georgia Blades is working with the program for Texas Art Education Fall Meeting in Fort Worth, hoping that Holland and Blades could connect for a repeat presentation to the members of TAEA. Enclosed in the letter to Holland, McCarter has sent a newsletter of the National Art Education Association, for Holland to get a feeling of strength from the teacher organization. Newsletter not present with letter.
Date: August 24, 1990
Creator: McCarter, William
Partner: UNT Libraries Special Collections
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[Letter from Bill McCarter to Peggy Mitchell, August 24, 1990]

Description: Photocopy of a letter from Bill McCarter, co-director of North Texas Institute for Educators on the Visual Arts, to Peggy Mitchell, teacher at Bedford Heights Elementary. McCarter writes that Mitchell's participation in the workshop for Art Teachers from Hurst-Euless-Bedford ISD was very appreciated and that Mitchell brings a special insight into the problems NTIEVA faces. McCarter writes that Mitchell and Sonja Starnes should be able to build a DBAE program for the schools.
Date: August 24, 1990
Creator: McCarter, William
Partner: UNT Libraries Special Collections
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[Letter from Leilani Lattin Duke to Bill McCarter, August 24, 1993]

Description: Photocopy of a letter from Leilani Lattin Duke, director of the Getty Center, to Bill McCarter, requesting McCarter's assistance in responding to the draft of the National Arts Standards. Duke expresses some concern with the content of the National Arts Standards draft and promises McCarter if he could give written feedback no later than October 1st, the Center will pay him.
Date: August 24, 1993
Creator: Duke, Leilani Lattin
Partner: UNT Libraries Special Collections
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[Letter from Bill McCarter to Sonja Starnes, August 24, 1990]

Description: Photocopy of a letter from Bill McCarter, co-director of North Texas Institute for Educators on the Visual Arts, to Sonja Starnes, Art Teacher at Bedford Heights Elementary. In regards to Starnes's participation in the workshop for elementary art teaches at Hurst-Euless-Bedford ISD. Starnes's leadership was insightful for the other faculty about the implementation of DBAE, discipline-based arts education, in HEB schools and McCarter is looking forward to working with her.
Date: August 24, 1990
Creator: McCarter, William
Partner: UNT Libraries Special Collections
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[Letter from Jack Davis to Mitch Jericho, October 24, 1995]

Description: Photocopy of a letter from Jack Davis, Dean of the School of Visual Arts at the University of North Texas, to Mitch Jericho. In regards to Jeff Patchen speaking at the Young Audiences conference in Dallas. Davis and his NTIEVA co-director Bill McCarter have discussed bringing Patchen to the University of North Texas, however, there is no justifiable reason to bring him to the School of Visual Arts since Patch is a musician. Davis is planning on sharing Jericho's letter to the David Sharder, Dean of the College of Music as he might have an interested in Patchen speaking with the music faculty.
Date: October 24, 1995
Creator: Davis, Donald Jack
Partner: UNT Libraries Special Collections

[Ralph Strangis in front of presentation]

Description: Photograph of Ralph Strangis standing in front of a display, giving a guest lecture. He is speaking to a group of Mayborn School of Journalism students that are out of frame. On the presentation behind him is a sketch of him laughing and the words "What they do -- and do n . . . you in college." Some of the words aren't visible.
Date: March 24, 2015
Creator: Clark, Junebug
Partner: UNT Libraries Special Collections

[Ralph Strangis speaking]

Description: Photograph of Ralph Strangis standing in front of a display, giving a guest lecture. He is speaking to a group of Mayborn School of Journalism students that are out of frame. The presentation reads "Senseless Productions; The Ralph Method".
Date: March 24, 2015
Creator: Clark, Junebug
Partner: UNT Libraries Special Collections
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